﻿//-----------------------------------------------------------------------
// <copyright company="www.3WayWebdesign.de">
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
// </copyright>
//
// <author>Michael Morbach</author>
// <email>Michael@3waywebdesign.de</email>
// <web>http://www.3waywebdesign.de</web>
//-----------------------------------------------------------------------

namespace Tww.Pixxler.WPFPixxlerLoginModule.ViewModels
{
    #region Imports

    using GalaSoft.MvvmLight.Command;
    using Microsoft.Practices.Unity;
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.Windows.Input;
    using Tww.AppToolkit.AppInfrastructure.Models.Content;
    using Tww.Pixxler.PixxlerAppInfrastructure.Interfaces.API;
    using Tww.Pixxler.PixxlerAppInfrastructure.Interfaces.ViewModels;


    #endregion

    public class LoginViewModel : ContentViewModelBase, ILoginViewModel
    {
        #region Private Fields

        private string loginUserNameText;
        private string loginPasswordText;
        private string errorMessage;

        /** Commands **/
        private RelayCommand loginCommand;

        #endregion

        #region Ctors

        public LoginViewModel( IUnityContainer unityContainer )
            : base( unityContainer, "Login" )
        {
            this.PixxlerAPI = unityContainer.Resolve<IPixxlerAPI>();
            this.RegisterEvents();
        }

        #endregion

        #region Commands

        public ICommand LoginCommand
        {
            get
            {
                return this.loginCommand ?? ( loginCommand = new RelayCommand( () => this.PerformLogin(), () => this.CanPerformLogin() ) );
            }
        }

        #endregion

        #region Public Properties

        /// <summary>
        /// Benutzername im Textfeld
        /// </summary>
        public string LoginUserNameText
        {
            get { return this.loginUserNameText; }
            set
            {
                this.loginUserNameText = value;
                this.RaisePropertyChanged<string>( () => LoginUserNameText );
            }
        }

        /// <summary>
        /// Passwort im Textfeld
        /// </summary>
        public string LoginPasswordText
        {
            get { return this.loginPasswordText; }
            set
            {
                this.loginPasswordText = value;
                this.RaisePropertyChanged<string>( () => LoginPasswordText );
            }
        }

        /// <summary>
        /// Text für Meldungen beim Login
        /// </summary>
        public string ErrorMessage
        {
            get { return this.errorMessage; }
            set
            {
                this.errorMessage = value;
                this.RaisePropertyChanged<string>( () => ErrorMessage );
            }
        }

        #endregion

        #region Private Properties

        /// <summary>
        /// Schnittstelle zum Service
        /// </summary>
        private IPixxlerAPI PixxlerAPI { get; set; }

        #endregion

        #region Public Methods

        public override void Cleanup()
        {
            base.Cleanup();

            this.UnRegisterEvents();
        }

        #endregion

        #region Private Methods

        private void RegisterEvents()
        {
            if ( this.PixxlerAPI != null )
            {
                this.PixxlerAPI.UserAPI.UserLoginSucceded += UserAPI_UserLoginSucceded;
                this.PixxlerAPI.UserAPI.UserLoginFailed += UserAPI_UserLoginFailed;
            }
        }

       

        private void UnRegisterEvents()
        {
            if ( this.PixxlerAPI != null )
            {
                this.PixxlerAPI.UserAPI.UserLoginSucceded -= UserAPI_UserLoginSucceded;
                this.PixxlerAPI.UserAPI.UserLoginFailed -= UserAPI_UserLoginFailed;
            }
        }

        private bool CanPerformLogin()
        {
            // TODO ggf. eine Sperre einbauen wenn mehrmals falsch
            return true;
        }

        private void PerformLogin()
        {
            if ( this.PixxlerAPI != null )
            {
                this.PixxlerAPI.UserAPI.Login( this.LoginUserNameText, this.LoginPasswordText );
            }
        }

        #endregion

        #region Eventhandling

        void UserAPI_UserLoginFailed( object sender, PixxlerAppInfrastructure.Events.EventArgs.LoginFailedEventArgs e )
        {
            this.ErrorMessage = e.ErrorMessage;
        }

        void UserAPI_UserLoginSucceded( object sender, EventArgs e )
        {
            this.Close();
        }

        #endregion

        #region Events

        #endregion


    }
}
